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Nano Research

Article Title

Molybdenum sulfide/graphene-carbon nanotube nanocomposite material for electrocatalytic applications in hydrogen evolution reactions

Authors

Majid Khan, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China Department of Computer Science and IT, Sarhad University of Science and Information Technology, Peshawar 25000, Pakistan
Ammar Bin Yousaf, Hefei National Laboratory for Physical Sciences at Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
Mingming Chen, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China
Chengsha Wei, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China
Xibo Wu, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China
Ningdong Huang, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China
Zemin Qi, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China
Liangbin Li, National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China

Keywords

3D nanostructure, MoS2, graphene, carbon nanotubes, hydrogen evolution reaction

Abstract

We report a three-dimensional hierarchical ternary hybrid composite of molybdenum disulfide (MoS2), reduced graphene oxide (GO), and carbon nanotubes (CNTs) prepared by a two-step process. Firstly, reduced GO–CNT composites with three-dimensional microstructuresare synthesized by hydrothermal treatment of an aqueous dispersion of GO and CNTs to form a composite structure via π–π interactions. Then, MoS2 nanoparticles are hydrothermally grown on the surfaces of the GO–CNT composite. This ternary composite shows superior electrocatalytic activity and stability in the hydrogen evolution reaction, with a low onset potential of only 35 mV, a Tafel slope of ~38 mV·decade−1, and an apparent exchange current density of 74.25 mA·cm−2. The superior hydrogen evolution activity stemmed from the synergistic effect of MoS2 with its electrocatalytically active edge-sites and excellent electrical coupling to the underlying graphene and CNT network.

Graphical Abstract

Publisher

Tsinghua University Press

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